Redefining Gentle Protection: The Clean Science of ShieldBiso™ SX

In the sun care industry, “gentle”is often treated as a marketing buzzword rather than a quantifiable technical metric. Brands frequently face a compromise: pursuing high-level protection usually requires high concentrations of chemical filters, which increases the risk of irritation; while claiming “clean beauty” often means sacrificing efficacy or sensory feel.

At Suzhou Sunland, we believe that true gentleness stems from clean molecular design, not from fixing problems at the end of the formulation process. This is the core idea behind ShieldBiso™ SX.

Beyond the Crude Game of pH Balancing 

Traditional free-acid UV filters (such as SX33) are essentially strong acids. To make them tolerable for skin, formulators must perform complex alkali neutralization. This not only adds process uncertainty but, more importantly, exposes the skin barrier to potential threats from the acidic environment.

ShieldBiso™ SX​ utilizes a pre-neutralized salt structure (Terephthalylidene Dicamphor Sulfonic Acid, Sodium Salt). This is a more advanced chemical form—we naturally lock the pH within a 5–7 weak acid to neutral range​ (1% solution). SX is inherently mild. It does not require additional reactants to achieve a gentle and comfortable effect. Being naturally weakly acidic, it dissolves directly in water, resulting in a cleaner formulation.

True Water-Solubility, Not “Fake Clarity” 

Many so-called water-based sunscreens on the market rely heavily on co-solvents or alcohols to achieve transparency. This goes against the original intention of “Clean Beauty.”

SX demonstrates True Water-Solubility. It integrates directly with water at concentrations exceeding 500 g/L​ without any auxiliary solvents. This pure solubility provides extreme lightness in texture and offers remarkable stability: even after being stored at 5℃ for 90 days, the solution remains perfectly clear with zero crystallization. For brands pursuing high-quality supply chains, this reliability is invaluable.

Dual Protection: For Skin and Nature

Being clean is not just about respecting human skin; it is also about respecting nature.

ShieldBiso™ SX​ features a large molecular weight of 562.69 Da, ensuring it hardly penetrates the skin barrier and stays on the surface to provide photoprotection. Meanwhile, as an Ocean-friendly​ ingredient, it has minimal impact on coral reefs and aquatic life.

To achieve high protection, formulators often have to balance irritation against sensory feel. We took a different approach: since the ingredient is for skin, it should be gentle straight out of the factory. SX is inherently mild. It does not need messy reactants to be comfortable. Naturally weakly acidic, it dissolves instantly in water for a clean formulation. It delivers robust UV protection while maintaining a gentle skin feel.

If you are looking for a water-soluble UVA filter that can support high-end sensitive skin lines and pass global regulatory reviews, ShieldBiso™ SX​ is your most rational choice.